O.C.Callihan from Montesano, Washington- in the 1880s !

I've been searching for O.C.Callahan and noticed some of the spellings in my look-ups as Callihan. Hopeing someone my know who this person was, I thought I'd try this post. I have no name for him, just know that he married my dad's mother (D.E. Guest) on July 24,1881 in Grays Harbor County of Washington state. Thanks, Dave.